Ethylene and Propylene: Key Feedstocks for Plastics and Other Industrial Uses Ethylene and propylene are key hydrocarbon gas feedstocks widely used in the petrochemical industry to manufacture important plastics, fibers, and other industrial products. Both gases are obtained primarily through the steam cracking of petroleum feedstocks such as naphtha, gas oil, liquefied petroleum gas (LPG), and natural gas liquids in petroleum refineries and dedicated gas cracker units....
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